<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <!--<style>
        #wrap .triangle {
            width: 0;
            height: 0;
            border-width: 40px;
            border-style: dashed solid dashed dashed;
            border-color: transparent red transparent transparent;
            overflow: hidden;
        }
    </style>-->
    <link rel="stylesheet" type="text/css" href="P02_匹配模式.css">
</head>
<body>
    <div id="wrap">
      <div class="triangle"></div>
    </div>
</body>
</html>